- Each location is ranked using the weekly average number of offences grouped into high, medium and low categories for the most recent calendar year for which the data has been finalised.
- Some locations will have a low ranking because they were inactive for some of, or were not commissioned until after, the year by which they have been ranked.
- The ranking system is at least one calendar year in arrears as figures are not finalised until pending court cases and driver identifications are resolved. Consequently, the information for the previous year will not be uploaded until the last quarter of the current year.